OPERATING INSTRUCTIONS NORDAC Frequency Inverters

Terminal Function / Notes Data Suggested circuit
15/16 Terminals for tachogenerator
(speed controller option)
15 Connection of the positive voltage of
the tachogenrator
The polarity at the terminals must remain
the same in the case of reversing the motor
DIP switch at the power supply board:
frequency- Speedcontrolled
controlled
S 3 - 1 ON (OFF) ON
S 3 - 2 ON OFF
S 3 - 6 OFF ON
highest control point
10-40V 30-100V
S 3 - 7 ON OFF
Only terminal 2 can be used as input for a
speed setpoint.
a) DC-tachogenerator one direction
b) DC-tachogenerator both directions
c) AC-tachogenerator with bridge-rectifier
for both directions
17/18 Multifunction relay
Closing of the floating contact with
a) programmed at "Current" I > ISet
b) programmed at "Frequency" f > fSet
19/20 Frequency-signalling relay
Closing of the floating contact with
f > fSet
21/22 Fault-signalling relay
Floating contact open:
- Fault has occured
- The inverter is disconnected from the mains
Contact is shown in no-voltage
condition. When the inverter is
ready for operation, the contact
is closed.
11